• M Salama, O Andrukhova, M A Hoda, S Taghavi, P Jaksch, G Heinze, W Klepetko, and S Aharinejad.
• Department of Cardiothoracic Surgery, Medical University of Vienna, Vienna, Austria.
• Am. J. Transplant. 2010 Mar 1; 10 (3): 628-36.

AbstractPrimary graft dysfunction (PGD) causes significant morbidity following lung transplantation (LTX). Mortality is high in PGD and therapeutic strategies are limited. To investigate whether endothelin-1 (ET-1) that mediates increased vascular permeability and edema formation in lung grafts can predict PGD, ET-1 mRNA expression was examined in lung tissue biopsies of 105 donors and recipients obtained shortly before LTX. Serum ET-1 concentration was assessed by ELISA. PGD grade was diagnosed and scored by oxygenation and radiological characteristics according to ISHLT guidelines. PGD grade 3 developed in 11% of patients. ET-1 mRNA expression was significantly increased in both donor (p < 0.0001) and recipient (p = 0.01) developing PGD as compared to no PGD group. Pretransplant ET-1 serum concentrations were elevated in recipients with PGD as compared to no PGD group (p < 0.0001), although serum ET-1 was not different between donors whose grafts developed PGD grades 0-3. In regression analysis, concomitant elevated donor tissue ET-1 and recipient serum ET-1 predicted PGD grade 3. This study indicates that pretransplant ET-1 mRNA overexpression in donors associated with elevated pretransplant serum ET-1 in recipients contribute to PGD development and that their assessment might be beneficial to predict PGD and to identify recipients who could benefit from a targeted ET-1 blockade.

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